Back to results
US 5,668,424 AGranted
Permanent magnet coupling and transmission
AssigneeMagna Force, Inc.
InventorKarl Jerome Lamb
Life of this patent
Estimating the term…
Abstract
A magnetic coupler has a magnetic disc containing permanent magnets located between two electroconductive plates and separated therefrom by air gaps. The magnetic disc and electroconductive plates are mounted on coaxial or parallel-spaced input and output shafts so that rotation of the input shaft causes rotation of the output shaft by way of magnetic friction between the permanent magnets and the electroconductive plates.
Claims10
A magnetic coupler comprising:
- two shafts;
- a group of two axially-spaced magnet rotors each containing a respective set of permanent magnets;
- and
- a group of two axially-spaced conductor rotors each having a nonferrous electroconductive ring spaced by an air gap from a respective one of said sets of magnets;
- the distance between the rotors of one of said groups being fixed, and such group being mounted on one of said shafts to rotate therewith;
- and
- the rotors of the other one of said groups being interconnected and arranged to be moveable axially and simultaneously along the other one of said shafts and to rotate together with said shaft such that the width of said air gaps are equally varied by such axial movement.
4 more elements
A magnetic coupler comprising:
- two coaxial shafts;
- a group of two axially spaced non-ferrous discs each containing a respective set of permanent magnets arranged in a circle with adjacent magnets having their poles reversed simultaneously;
- a group of two axially-spaced discs each presenting a circular non-ferrous electroconductive element spaced by an air gap from a respective one of said sets of magnets, said air gaps normally being equal in width;
- the distance between the discs of one of said groups being fixed, and such group being mounted on one of said shafts to rotate therewith;
- the discs of the other of said groups being interconnected and mounted to be moveable axially and simultaneously along the other of said shafts and to rotate together with such shaft such that the width of said air gaps are varied equally by such axial movement.
2 more elements
Dependencies are inferred from the claim text.